Microsegregation Behavior of Single Crystal Superalloy

Abstract:

The major advancements in some mechanical properties of single crystal superalloys can be attributed to the carbon addition. The present study investigated the effect of carbon addition levels on the microsegregation behavior of single crystal superalloys. Quantitatative partitioning results indicated that typical single crystal superalloy segregation behavior for some elements such as W, Ni, Co, are all towards the dendrite core regions, while for elements of Al, Mo, Ta, Ti, Cr, partition towards the interdendrite regions. For all the alloys studied, the baseline alloy showed the most severe segregation degree, while the no carbon alloy the slightest. Furthermore, the segregation behavior of Ti and Ta were affected by the carbon additions, and that of W was greatly affected by the carbon levels.

• Periodical: Advanced Materials Research (Volume 983)
• Pages: 121-126
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.983.121
• Online since: June 2014
• Authors: Zhu Huan Yu*, Jun Feng Qiang
• Keywords: Carbon, Electron Probe Microanalysis (EPMA), Segregation Behavior

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